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中文摘要：
沿黄灌区在甘肃经济发展中占有举足轻重的地位，但盐碱荒地的开发利用、次生盐渍化防治和水资源的不合理利用一直是制约农业发展的关键因素之一。通过对甘肃沿黄灌区耕地土壤盐分含量、离子组成与分布、土壤pH及地下水矿化度等特征，及盐碱地形成的气候、地形、土壤母质、人为因素进行系统分析。在此基础上，提出了5条改良措施与建议：① 实行盐碱地分区治理；② 调整农业产业结构；③ 强化盐碱地生物治理；④ 建全节水农业体系；⑤ 加强水盐运移动态监测，建立预警评价体系。
英文摘要：
The irrigated areas along the Yellow River are very important in economic development in Gansu Prov- ince. Saline or alkaline wasteland, secondary soil salinization and irrational utilization of water resources are the main factors to restrict the agricultural development. In this paper, the general situation of soil salinization in the ir- rigated areas along the Yellow River in Gansu Province was expounded. Available data were used to analyze the characteristics of soil salt content, ionic composition and distribution as well as soil pH value and groundwater salin- ity. The climate, topography, soil parent material and human factors related to the formation of saline or alkaline land were also analyzed. On which some suggestions were put forward for improving soil： （1） Partition improvement of saline or alkaline land should be implemented, and the prevention of secondary soil salinization must be paid great attention to ; （2） Utilization of water and soil resources should be optimized so as to regulate the agricultural in- dustry structure ; （3） The efficient utilization of saline or alkaline land in agricultural development should be focused on, and the biological control measures should be strengthened ; （4） It is suggested to enhance the utilization of wa- ter resources so as to develop the water-saving farming system; （5） The dynamic monitoring of water and salt trans- ference should be strengthened so as to develop an early-warning system of soil salinization.
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